raw_ip6.c revision 1.54
1 /* $NetBSD: raw_ip6.c,v 1.54 2003/06/29 22:32:02 fvdl Exp $ */ 2 /* $KAME: raw_ip6.c,v 1.82 2001/07/23 18:57:56 jinmei Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1988, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: raw_ip6.c,v 1.54 2003/06/29 22:32:02 fvdl Exp $"); 70 71 #include "opt_ipsec.h" 72 73 #include <sys/param.h> 74 #include <sys/malloc.h> 75 #include <sys/mbuf.h> 76 #include <sys/socket.h> 77 #include <sys/protosw.h> 78 #include <sys/socketvar.h> 79 #include <sys/errno.h> 80 #include <sys/systm.h> 81 #include <sys/proc.h> 82 83 #include <net/if.h> 84 #include <net/route.h> 85 #include <net/if_types.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/ip6_mroute.h> 92 #include <netinet/icmp6.h> 93 #include <netinet6/in6_pcb.h> 94 #include <netinet6/nd6.h> 95 #include <netinet6/ip6protosw.h> 96 #ifdef ENABLE_DEFAULT_SCOPE 97 #include <netinet6/scope6_var.h> 98 #endif 99 #include <netinet6/raw_ip6.h> 100 101 #ifdef IPSEC 102 #include <netinet6/ipsec.h> 103 #endif /* IPSEC */ 104 105 #include <machine/stdarg.h> 106 107 #include "faith.h" 108 #if defined(NFAITH) && 0 < NFAITH 109 #include <net/if_faith.h> 110 #endif 111 112 struct in6pcb rawin6pcb; 113 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 114 115 /* 116 * Raw interface to IP6 protocol. 117 */ 118 119 struct rip6stat rip6stat; 120 121 /* 122 * Initialize raw connection block queue. 123 */ 124 void 125 rip6_init() 126 { 127 128 rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb; 129 } 130 131 /* 132 * Setup generic address and protocol structures 133 * for raw_input routine, then pass them along with 134 * mbuf chain. 135 */ 136 int 137 rip6_input(mp, offp, proto) 138 struct mbuf **mp; 139 int *offp, proto; 140 { 141 struct mbuf *m = *mp; 142 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 143 struct in6pcb *in6p; 144 struct in6pcb *last = NULL; 145 struct sockaddr_in6 rip6src; 146 struct mbuf *opts = NULL; 147 148 rip6stat.rip6s_ipackets++; 149 150 #if defined(NFAITH) && 0 < NFAITH 151 if (faithprefix(&ip6->ip6_dst)) { 152 /* send icmp6 host unreach? */ 153 m_freem(m); 154 return IPPROTO_DONE; 155 } 156 #endif 157 158 /* Be proactive about malicious use of IPv4 mapped address */ 159 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 160 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 161 /* XXX stat */ 162 m_freem(m); 163 return IPPROTO_DONE; 164 } 165 166 bzero(&rip6src, sizeof(rip6src)); 167 rip6src.sin6_len = sizeof(struct sockaddr_in6); 168 rip6src.sin6_family = AF_INET6; 169 #if 0 /* XXX inbound flowlabel */ 170 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 171 #endif 172 /* KAME hack: recover scopeid */ 173 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 174 175 for (in6p = rawin6pcb.in6p_next; 176 in6p != &rawin6pcb; in6p = in6p->in6p_next) 177 { 178 if (in6p->in6p_ip6.ip6_nxt && 179 in6p->in6p_ip6.ip6_nxt != proto) 180 continue; 181 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 182 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 183 continue; 184 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 185 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 186 continue; 187 if (in6p->in6p_cksum != -1) { 188 rip6stat.rip6s_isum++; 189 if (in6_cksum(m, ip6->ip6_nxt, *offp, 190 m->m_pkthdr.len - *offp)) { 191 rip6stat.rip6s_badsum++; 192 continue; 193 } 194 } 195 if (last) { 196 struct mbuf *n; 197 198 #ifdef IPSEC 199 /* 200 * Check AH/ESP integrity. 201 */ 202 if (ipsec6_in_reject(m, last)) { 203 ipsec6stat.in_polvio++; 204 /* do not inject data into pcb */ 205 } else 206 #endif /* IPSEC */ 207 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 208 if (last->in6p_flags & IN6P_CONTROLOPTS) 209 ip6_savecontrol(last, &opts, ip6, n); 210 /* strip intermediate headers */ 211 m_adj(n, *offp); 212 if (sbappendaddr(&last->in6p_socket->so_rcv, 213 (struct sockaddr *)&rip6src, n, opts) == 0) { 214 /* should notify about lost packet */ 215 m_freem(n); 216 if (opts) 217 m_freem(opts); 218 rip6stat.rip6s_fullsock++; 219 } else 220 sorwakeup(last->in6p_socket); 221 opts = NULL; 222 } 223 } 224 last = in6p; 225 } 226 #ifdef IPSEC 227 /* 228 * Check AH/ESP integrity. 229 */ 230 if (last && ipsec6_in_reject(m, last)) { 231 m_freem(m); 232 ipsec6stat.in_polvio++; 233 ip6stat.ip6s_delivered--; 234 /* do not inject data into pcb */ 235 } else 236 #endif /* IPSEC */ 237 if (last) { 238 if (last->in6p_flags & IN6P_CONTROLOPTS) 239 ip6_savecontrol(last, &opts, ip6, m); 240 /* strip intermediate headers */ 241 m_adj(m, *offp); 242 if (sbappendaddr(&last->in6p_socket->so_rcv, 243 (struct sockaddr *)&rip6src, m, opts) == 0) { 244 m_freem(m); 245 if (opts) 246 m_freem(opts); 247 rip6stat.rip6s_fullsock++; 248 } else 249 sorwakeup(last->in6p_socket); 250 } else { 251 rip6stat.rip6s_nosock++; 252 if (m->m_flags & M_MCAST) 253 rip6stat.rip6s_nosockmcast++; 254 if (proto == IPPROTO_NONE) 255 m_freem(m); 256 else { 257 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 258 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 259 icmp6_error(m, ICMP6_PARAM_PROB, 260 ICMP6_PARAMPROB_NEXTHEADER, 261 prvnxtp - mtod(m, u_int8_t *)); 262 } 263 ip6stat.ip6s_delivered--; 264 } 265 return IPPROTO_DONE; 266 } 267 268 void 269 rip6_ctlinput(cmd, sa, d) 270 int cmd; 271 struct sockaddr *sa; 272 void *d; 273 { 274 struct ip6_hdr *ip6; 275 struct mbuf *m; 276 int off; 277 struct ip6ctlparam *ip6cp = NULL; 278 const struct sockaddr_in6 *sa6_src = NULL; 279 void *cmdarg; 280 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 281 int nxt; 282 283 if (sa->sa_family != AF_INET6 || 284 sa->sa_len != sizeof(struct sockaddr_in6)) 285 return; 286 287 if ((unsigned)cmd >= PRC_NCMDS) 288 return; 289 if (PRC_IS_REDIRECT(cmd)) 290 notify = in6_rtchange, d = NULL; 291 else if (cmd == PRC_HOSTDEAD) 292 d = NULL; 293 else if (cmd == PRC_MSGSIZE) 294 ; /* special code is present, see below */ 295 else if (inet6ctlerrmap[cmd] == 0) 296 return; 297 298 /* if the parameter is from icmp6, decode it. */ 299 if (d != NULL) { 300 ip6cp = (struct ip6ctlparam *)d; 301 m = ip6cp->ip6c_m; 302 ip6 = ip6cp->ip6c_ip6; 303 off = ip6cp->ip6c_off; 304 cmdarg = ip6cp->ip6c_cmdarg; 305 sa6_src = ip6cp->ip6c_src; 306 nxt = ip6cp->ip6c_nxt; 307 } else { 308 m = NULL; 309 ip6 = NULL; 310 cmdarg = NULL; 311 sa6_src = &sa6_any; 312 nxt = -1; 313 } 314 315 if (ip6 && cmd == PRC_MSGSIZE) { 316 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 317 int valid = 0; 318 struct in6pcb *in6p; 319 320 /* 321 * Check to see if we have a valid raw IPv6 socket 322 * corresponding to the address in the ICMPv6 message 323 * payload, and the protocol (ip6_nxt) meets the socket. 324 * XXX chase extension headers, or pass final nxt value 325 * from icmp6_notify_error() 326 */ 327 in6p = NULL; 328 in6p = in6_pcblookup_connect(&rawin6pcb, &sa6->sin6_addr, 0, 329 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 330 #if 0 331 if (!in6p) { 332 /* 333 * As the use of sendto(2) is fairly popular, 334 * we may want to allow non-connected pcb too. 335 * But it could be too weak against attacks... 336 * We should at least check if the local 337 * address (= s) is really ours. 338 */ 339 in6p = in6_pcblookup_bind(&rawin6pcb, 340 &sa6->sin6_addr, 0, 0)) 341 } 342 #endif 343 344 if (in6p && in6p->in6p_ip6.ip6_nxt && 345 in6p->in6p_ip6.ip6_nxt == nxt) 346 valid++; 347 348 /* 349 * Depending on the value of "valid" and routing table 350 * size (mtudisc_{hi,lo}wat), we will: 351 * - recalculate the new MTU and create the 352 * corresponding routing entry, or 353 * - ignore the MTU change notification. 354 */ 355 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 356 357 /* 358 * regardless of if we called icmp6_mtudisc_update(), 359 * we need to call in6_pcbnotify(), to notify path 360 * MTU change to the userland (2292bis-02), because 361 * some unconnected sockets may share the same 362 * destination and want to know the path MTU. 363 */ 364 } 365 366 (void) in6_pcbnotify(&rawin6pcb, sa, 0, 367 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 368 } 369 370 /* 371 * Generate IPv6 header and pass packet to ip6_output. 372 * Tack on options user may have setup with control call. 373 */ 374 int 375 #if __STDC__ 376 rip6_output(struct mbuf *m, ...) 377 #else 378 rip6_output(m, va_alist) 379 struct mbuf *m; 380 va_dcl 381 #endif 382 { 383 struct socket *so; 384 struct sockaddr_in6 *dstsock; 385 struct mbuf *control; 386 struct in6_addr *dst; 387 struct ip6_hdr *ip6; 388 struct in6pcb *in6p; 389 u_int plen = m->m_pkthdr.len; 390 int error = 0; 391 struct ip6_pktopts opt, *optp = NULL, *origoptp; 392 struct ifnet *oifp = NULL; 393 int type, code; /* for ICMPv6 output statistics only */ 394 int priv = 0; 395 va_list ap; 396 int flags; 397 398 va_start(ap, m); 399 so = va_arg(ap, struct socket *); 400 dstsock = va_arg(ap, struct sockaddr_in6 *); 401 control = va_arg(ap, struct mbuf *); 402 va_end(ap); 403 404 in6p = sotoin6pcb(so); 405 406 priv = 0; 407 { 408 struct proc *p = curproc; /* XXX */ 409 410 if (p && !suser(p->p_ucred, &p->p_acflag)) 411 priv = 1; 412 } 413 dst = &dstsock->sin6_addr; 414 if (control) { 415 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 416 goto bad; 417 optp = &opt; 418 } else 419 optp = in6p->in6p_outputopts; 420 421 /* 422 * For an ICMPv6 packet, we should know its type and code 423 * to update statistics. 424 */ 425 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 426 struct icmp6_hdr *icmp6; 427 if (m->m_len < sizeof(struct icmp6_hdr) && 428 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 429 error = ENOBUFS; 430 goto bad; 431 } 432 icmp6 = mtod(m, struct icmp6_hdr *); 433 type = icmp6->icmp6_type; 434 code = icmp6->icmp6_code; 435 } 436 437 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 438 if (!m) { 439 error = ENOBUFS; 440 goto bad; 441 } 442 ip6 = mtod(m, struct ip6_hdr *); 443 444 /* 445 * Next header might not be ICMP6 but use its pseudo header anyway. 446 */ 447 ip6->ip6_dst = *dst; 448 449 /* KAME hack: embed scopeid */ 450 origoptp = in6p->in6p_outputopts; 451 in6p->in6p_outputopts = optp; 452 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 453 error = EINVAL; 454 goto bad; 455 } 456 in6p->in6p_outputopts = origoptp; 457 458 /* 459 * Source address selection. 460 */ 461 { 462 struct in6_addr *in6a; 463 464 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 465 &in6p->in6p_route, &in6p->in6p_laddr, &error)) == 0) { 466 if (error == 0) 467 error = EADDRNOTAVAIL; 468 goto bad; 469 } 470 ip6->ip6_src = *in6a; 471 if (in6p->in6p_route.ro_rt) { 472 /* what if oifp contradicts ? */ 473 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 474 } 475 } 476 477 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 478 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 479 ip6->ip6_vfc |= IPV6_VERSION; 480 #if 0 /* ip6_plen will be filled in ip6_output. */ 481 ip6->ip6_plen = htons((u_short)plen); 482 #endif 483 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 484 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 485 486 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 487 in6p->in6p_cksum != -1) { 488 int off; 489 u_int16_t sum; 490 491 /* compute checksum */ 492 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 493 off = offsetof(struct icmp6_hdr, icmp6_cksum); 494 else 495 off = in6p->in6p_cksum; 496 if (plen < off + 1) { 497 error = EINVAL; 498 goto bad; 499 } 500 off += sizeof(struct ip6_hdr); 501 502 sum = 0; 503 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 504 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 505 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 506 } 507 508 #ifdef IPSEC 509 if (ipsec_setsocket(m, so) != 0) { 510 error = ENOBUFS; 511 goto bad; 512 } 513 #endif /* IPSEC */ 514 515 flags = 0; 516 #ifdef IN6P_MINMTU 517 if (in6p->in6p_flags & IN6P_MINMTU) 518 flags |= IPV6_MINMTU; 519 #endif 520 521 error = ip6_output(m, optp, &in6p->in6p_route, flags, 522 in6p->in6p_moptions, &oifp); 523 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 524 if (oifp) 525 icmp6_ifoutstat_inc(oifp, type, code); 526 icmp6stat.icp6s_outhist[type]++; 527 } else 528 rip6stat.rip6s_opackets++; 529 530 goto freectl; 531 532 bad: 533 if (m) 534 m_freem(m); 535 536 freectl: 537 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 538 RTFREE(optp->ip6po_route.ro_rt); 539 if (control) 540 m_freem(control); 541 return (error); 542 } 543 544 /* 545 * Raw IPv6 socket option processing. 546 */ 547 int 548 rip6_ctloutput(op, so, level, optname, mp) 549 int op; 550 struct socket *so; 551 int level, optname; 552 struct mbuf **mp; 553 { 554 int error = 0; 555 556 switch (level) { 557 case IPPROTO_IPV6: 558 switch (optname) { 559 case MRT6_INIT: 560 case MRT6_DONE: 561 case MRT6_ADD_MIF: 562 case MRT6_DEL_MIF: 563 case MRT6_ADD_MFC: 564 case MRT6_DEL_MFC: 565 case MRT6_PIM: 566 if (op == PRCO_SETOPT) { 567 error = ip6_mrouter_set(optname, so, *mp); 568 if (*mp) 569 (void)m_free(*mp); 570 } else if (op == PRCO_GETOPT) 571 error = ip6_mrouter_get(optname, so, mp); 572 else 573 error = EINVAL; 574 return (error); 575 case IPV6_CHECKSUM: 576 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 577 default: 578 return (ip6_ctloutput(op, so, level, optname, mp)); 579 } 580 581 case IPPROTO_ICMPV6: 582 /* 583 * XXX: is it better to call icmp6_ctloutput() directly 584 * from protosw? 585 */ 586 return (icmp6_ctloutput(op, so, level, optname, mp)); 587 588 default: 589 if (op == PRCO_SETOPT && *mp) 590 m_free(*mp); 591 return EINVAL; 592 } 593 } 594 595 extern u_long rip6_sendspace; 596 extern u_long rip6_recvspace; 597 598 int 599 rip6_usrreq(so, req, m, nam, control, p) 600 struct socket *so; 601 int req; 602 struct mbuf *m, *nam, *control; 603 struct proc *p; 604 { 605 struct in6pcb *in6p = sotoin6pcb(so); 606 int s; 607 int error = 0; 608 int priv; 609 610 priv = 0; 611 if (p && !suser(p->p_ucred, &p->p_acflag)) 612 priv++; 613 614 if (req == PRU_CONTROL) 615 return (in6_control(so, (u_long)m, (caddr_t)nam, 616 (struct ifnet *)control, p)); 617 618 if (req == PRU_PURGEIF) { 619 in6_pcbpurgeif0(&rawin6pcb, (struct ifnet *)control); 620 in6_purgeif((struct ifnet *)control); 621 in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control); 622 return (0); 623 } 624 625 switch (req) { 626 case PRU_ATTACH: 627 if (in6p) 628 panic("rip6_attach"); 629 if (!priv) { 630 error = EACCES; 631 break; 632 } 633 s = splsoftnet(); 634 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 635 splx(s); 636 break; 637 } 638 if ((error = in6_pcballoc(so, &rawin6pcb)) != 0) 639 { 640 splx(s); 641 break; 642 } 643 splx(s); 644 in6p = sotoin6pcb(so); 645 in6p->in6p_ip6.ip6_nxt = (long)nam; 646 in6p->in6p_cksum = -1; 647 648 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 649 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 650 if (in6p->in6p_icmp6filt == NULL) { 651 in6_pcbdetach(in6p); 652 error = ENOMEM; 653 break; 654 } 655 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 656 break; 657 658 case PRU_DISCONNECT: 659 if ((so->so_state & SS_ISCONNECTED) == 0) { 660 error = ENOTCONN; 661 break; 662 } 663 in6p->in6p_faddr = in6addr_any; 664 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 665 break; 666 667 case PRU_ABORT: 668 soisdisconnected(so); 669 /* Fallthrough */ 670 case PRU_DETACH: 671 if (in6p == 0) 672 panic("rip6_detach"); 673 if (so == ip6_mrouter) 674 ip6_mrouter_done(); 675 /* xxx: RSVP */ 676 if (in6p->in6p_icmp6filt) { 677 FREE(in6p->in6p_icmp6filt, M_PCB); 678 in6p->in6p_icmp6filt = NULL; 679 } 680 in6_pcbdetach(in6p); 681 break; 682 683 case PRU_BIND: 684 { 685 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 686 struct ifaddr *ia = NULL; 687 688 if (nam->m_len != sizeof(*addr)) { 689 error = EINVAL; 690 break; 691 } 692 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 693 error = EADDRNOTAVAIL; 694 break; 695 } 696 #ifdef ENABLE_DEFAULT_SCOPE 697 if (addr->sin6_scope_id == 0) /* not change if specified */ 698 addr->sin6_scope_id = 699 scope6_addr2default(&addr->sin6_addr); 700 #endif 701 /* KAME hack: embed scopeid */ 702 if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0) 703 return EINVAL; 704 #ifndef SCOPEDROUTING 705 addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */ 706 #endif 707 708 /* 709 * we don't support mapped address here, it would confuse 710 * users so reject it 711 */ 712 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 713 error = EADDRNOTAVAIL; 714 break; 715 } 716 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 717 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 718 error = EADDRNOTAVAIL; 719 break; 720 } 721 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 722 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 723 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 724 error = EADDRNOTAVAIL; 725 break; 726 } 727 in6p->in6p_laddr = addr->sin6_addr; 728 break; 729 } 730 731 case PRU_CONNECT: 732 { 733 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 734 struct in6_addr *in6a = NULL; 735 #ifdef ENABLE_DEFAULT_SCOPE 736 struct sockaddr_in6 sin6; 737 #endif 738 739 if (nam->m_len != sizeof(*addr)) { 740 error = EINVAL; 741 break; 742 } 743 if (ifnet.tqh_first == 0) 744 { 745 error = EADDRNOTAVAIL; 746 break; 747 } 748 if (addr->sin6_family != AF_INET6) { 749 error = EAFNOSUPPORT; 750 break; 751 } 752 753 #ifdef ENABLE_DEFAULT_SCOPE 754 if (addr->sin6_scope_id == 0) { 755 /* protect *addr */ 756 sin6 = *addr; 757 addr = &sin6; 758 addr->sin6_scope_id = 759 scope6_addr2default(&addr->sin6_addr); 760 } 761 #endif 762 763 /* Source address selection. XXX: need pcblookup? */ 764 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 765 in6p->in6p_moptions, &in6p->in6p_route, 766 &in6p->in6p_laddr, &error); 767 if (in6a == NULL) { 768 if (error == 0) 769 error = EADDRNOTAVAIL; 770 break; 771 } 772 in6p->in6p_laddr = *in6a; 773 in6p->in6p_faddr = addr->sin6_addr; 774 soisconnected(so); 775 break; 776 } 777 778 case PRU_CONNECT2: 779 error = EOPNOTSUPP; 780 break; 781 782 /* 783 * Mark the connection as being incapable of futther input. 784 */ 785 case PRU_SHUTDOWN: 786 socantsendmore(so); 787 break; 788 /* 789 * Ship a packet out. The appropriate raw output 790 * routine handles any messaging necessary. 791 */ 792 case PRU_SEND: 793 { 794 struct sockaddr_in6 tmp; 795 struct sockaddr_in6 *dst; 796 797 /* always copy sockaddr to avoid overwrites */ 798 if (so->so_state & SS_ISCONNECTED) { 799 if (nam) { 800 error = EISCONN; 801 break; 802 } 803 /* XXX */ 804 bzero(&tmp, sizeof(tmp)); 805 tmp.sin6_family = AF_INET6; 806 tmp.sin6_len = sizeof(struct sockaddr_in6); 807 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 808 sizeof(struct in6_addr)); 809 dst = &tmp; 810 } else { 811 if (nam == NULL) { 812 error = ENOTCONN; 813 break; 814 } 815 if (nam->m_len != sizeof(tmp)) { 816 error = EINVAL; 817 break; 818 } 819 820 tmp = *mtod(nam, struct sockaddr_in6 *); 821 dst = &tmp; 822 823 if (dst->sin6_family != AF_INET6) { 824 error = EAFNOSUPPORT; 825 break; 826 } 827 } 828 #ifdef ENABLE_DEFAULT_SCOPE 829 if (dst->sin6_scope_id == 0) { 830 dst->sin6_scope_id = 831 scope6_addr2default(&dst->sin6_addr); 832 } 833 #endif 834 error = rip6_output(m, so, dst, control); 835 m = NULL; 836 break; 837 } 838 839 case PRU_SENSE: 840 /* 841 * stat: don't bother with a blocksize 842 */ 843 return (0); 844 /* 845 * Not supported. 846 */ 847 case PRU_RCVOOB: 848 case PRU_RCVD: 849 case PRU_LISTEN: 850 case PRU_ACCEPT: 851 case PRU_SENDOOB: 852 error = EOPNOTSUPP; 853 break; 854 855 case PRU_SOCKADDR: 856 in6_setsockaddr(in6p, nam); 857 break; 858 859 case PRU_PEERADDR: 860 in6_setpeeraddr(in6p, nam); 861 break; 862 863 default: 864 panic("rip6_usrreq"); 865 } 866 if (m != NULL) 867 m_freem(m); 868 return (error); 869 } 870
Indexes created Tue Sep 23 07:09:52 GMT 2025